Equinox 2024 Days. The september 22, 2024, equinox marks a significant astronomical event, heralding the beginning of fall in the northern hemisphere and the start of spring in the southern hemisphere. From date to significance, here's all that you need to know about the special time of the year.
The vernal equinox โ is an astronomical phenomenon when the sun, in its visible motion along the ecliptic, crosses the celestial equator. Equinoxes and solstices are two of the most important celestial events on earth.